Sensitivity Analysis on the Buildings and Landslides Seismic Response to the Application of Artificial and Recorded Accelerograms

Abstract eng:
In the paper the results of the dynamic analyses performed on landslides and buildings are presented. The aim of the project is the comparison of the influence due to the application of artificial and recorded accelerograms. So two different sets of artificial and recorded accelerograms have been applied on landslides and buildings. To have the accelerograms a probabilistic approach was adopted, on the basis of the data available from the Italian hazard map, for the studied site, two expected pseudo-acceleration elastic response spectra considering two return period (50 and 475 years) have been selected and used as target spectra. Starting from these targets two sets of seven artificial accelerograms have been calculated and two sets of seven recorded accelerograms have been selected from the available accelerogram database. To perform the dynamic analyses, in the first case (landslides) the method of Newmark has been used and the results, in term of expected displacements, are discussed. In the second case (buildings) the dynamic analyses have been performed using the “MIDAS Gen” software and the results, in term of storey base shear, acceleration and interstory drift are presented. The results, obtained by the application of the different sets of accelerograms, are similar, suggesting, in this kind of analysis, the possible use of both artificial and recorded accelerograms.

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